@article{DE_1966_2_5_a1,
     author = {M. M. Khapaev},
     title = {On the averaging method in certain problems connected with averaging},
     journal = {Differencialʹnye uravneni\^a},
     pages = {600--608},
     publisher = {mathdoc},
     volume = {2},
     number = {5},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_5_a1/}
}